Patent GB-384117-A (GB)
Title: Improvements in or relating to late news and like mechanism for use in printing machines
IPC: B41F13/46
Filed: 1932-01-22
Abstract: 384,117. Late-news &c. printing. QUICK, C. G. and BENNETT, T. R., 109, Borough Road, London. Jan. 22, 1932, No. 2083. [Class 100 (ii).] In late-news and like printing-mechanisms means are provided for speeding up the printing- cylinders independently to the speed of the impression cylinder, and for moving them into and out of contact, the means being so interlocked that, when moving the cylinders into contact, the first means must be actuated to effect speeding up and registration first, and vice versa. Two late-news cylinders 3, Fig. 3, are carried on axles 4, mounted in eccentric bear. ings 5, and can be moved to and from the impression cylinder 1 by rotation of the bearings 5 by links 7, operated through eccentrics mounted on shafts 6 and worm gears 9 from hand-wheels 8. The shaft 4 is driven from the impression cylinder shaft by gears engaging with a gear 12 mounted loosely on the shaft, and alternative means, described below, are used to obtain speeding up and engagement between gear 12 and shaft 4. In the form shown in Figs. 2 and 6, the gear 12 is on a sleeve revolving loosely on the shaft, and on the sleeve are mounted planet gears 15, meshing with external and internal gears 16, 19, mounted respectively on a sleeve 17 keyed to shaft 4 and on a drum 191 attached to a sleeve 21. Brake bands 18, 20 act on a sleeve 171 keyed to the shaft 4 and on sleeve 21, respectively, and are controlled by cams 22, 23 on an axle 24, in such a way that, when one brake is on, the other is off. The axle 24 is controlled by an arm 25 and link 26, eccentrically pivoted to a disc 27, which is rotated by a worm wheel 29, operated through a worm 30 by a hand-wheel 31. Also mounted on the axis of the wheel 29 are a cam disc 34, controlling a spring-pressed pin 36, and a mutilated disc 32. Another mutilated disc 33 is mounted on the axle 6. Then, when the printing- cylinders are to be brought into operation, the wheel 31 is first rotated, thus unbraking the sleeve 171 and braking the drum 19<1> so that the axle 4 is driven through the gears 15 and sleeve 17. Circumferential register is obtained by the pin 36, which slips into an aperture in the drum 191 as it comes to rest. The mutilated disc 33 can now move through the mutilated portion of the disc 32, and the axle 6 can therefore be rotated by the wheel 8, to bring the printing-cylinder into contact. The degree of printing pressure is regulated by stops 10. In the form shown in Figs. 7 and 10, the transmission means from gear 38 to the shaft 4 comprises a disc friction clutch, one member 39 of which is bolted to the gear and the other 40 mounted on a sleeve 41 keyed to the shaft 4. The disc 40 is spring-pressed towards the disc 39 and is controlled by bell-crank levers 43, operated by the action of sliding sleeve 44 on bowls 46 mounted on the levers. A spring- pressed pin 47 is carried by sleeves 44, 41 and is adapted to slip into an opening 48 in the gear 38. The sleeve 44 is controlled by a trunnion 49, operated by a link 50, eccentrically pivoted to a worm wheel 52, actuated by a worm 53 and hand-wheel 54. The axle of the wheel 52 also carries a notched disc 55 and an eccentric pin 59, which latter controls through a link 60 a brake 63 on the shaft 4. The brake 63 may also be manually operated by a treadle 65. A flanged disc 57 on the shaft 6 is provided with notches which interlock with the disc 55, and a latch 67 locks into the notches on the disc 55 in the operative and inoperative positions. To bring the printing-rollers into contact, the wheel 54 must first be rotated thus moving the sleeve 44 to the right. The bowls 46 first drop into hollows 45 in the sleeve and thus bring the friction discs 39, 40 into contact, thus speeding up the axle 4. On further motion the bowls move out of the hollows but the drive is now made positive and in correct circumferential register by the engagement of the pin 47 in opening 48. The flange 57 can now move through the notch in the disc 55, and the shaft 6 can be rotated to bring the rollers into contact. In a further modification the friction drive is in the form of an internally-expanding clutch.